313321121 has 2 divisors, whose sum is σ = 313321122. Its totient is φ = 313321120.

The previous prime is 313321081. The next prime is 313321147. The reversal of 313321121 is 121123313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 226924096 + 86397025 = 15064^2 + 9295^2 .

It is a cyclic number.

It is not a de Polignac number, because 313321121 - 2²² = 309126817 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 313321121.

It is not a weakly prime, because it can be changed into another prime (313321171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156660560 + 156660561.

It is an arithmetic number, because the mean of its divisors is an integer number (156660561).

Almost surely, 2^313321121 is an apocalyptic number.

It is an amenable number.

313321121 is a deficient number, since it is larger than the sum of its proper divisors (1).

313321121 is an equidigital number, since it uses as much as digits as its factorization.

313321121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108, while the sum is 17.

The square root of 313321121 is about 17700.8791024627. The cubic root of 313321121 is about 679.1982484082.

Adding to 313321121 its reverse (121123313), we get a palindrome (434444434).

The spelling of 313321121 in words is "three hundred thirteen million, three hundred twenty-one thousand, one hundred twenty-one".